166 STORRS AGRICULTURAL EXPERIMENT STATION. 
alike. The only case of a considerable variation from the 
other samples was in that from pot 21 which showed a con- 
siderably lower percentage of nitrogen than the other samples 
from thesame group. ‘The percentages of nitrogen in the crops 
of the pots in the different groups varied markedly with the 
amounts of nitrogen used. ‘The average percentage in the 
crop where the largest quantity of nitrogen used was nearly 
twice as large as the average where no nitrogen was used in 
the fertilizer. Of course corresponding differences are seen in 
percentages of protein. 
EXPERIMENTS WITH HUNGARIAN GRASS, 1899. 
The experiment on Hungarian grass in 1899 was a repeti- 
tion of the experiment of 1898 in the same lot of pots and 
without change of soil. ‘The soil was taken from each pot and 
sifted to remove the roots, after which it was returned to the 
pot from which it came, and then fertilizer was added in the 
same manner as in the previous year. 
Samples were taken August 17, 1899. The plants were in 
bloom when harvested. The total crop from each pot was cut 
off about one inch above the soil, then cut up into pieces about 
a half an inch long, and hung in loose paper bags in the plant 
house to dry. 
On the pots with mineral fertilizers the growth was rather 
slender, mostly stem, and pale reddish-yellow in color; on the 
pots with the small amount of nitrogen there was a fair crop, 
with a medium amount of leaf growth, slightly yellow in color; 
on the pots with the medium amount of nitrogen the crop was 
quite heavy, with a large amount of leaf growth, and of good 
color; on the pots with the large nitrogen ration there was a 
heavy crop with thick leaf growth and dark green in color. 
From a comparison of the results in the table below with 
those in Table 48 it will be observed that the average yield of 
fodder per pot in the different groups was not as large as in 
1898, but in most cases was fairly uniform from pots having 
the same amounts of nitrogen, and the relative increase in the 
yield from pots with the larger rations of nitrogen was much 
the same for the two years. Why the total yield on the vari- 
ous pots was so much less the second year than the first is not 
evident unless it is that an excess of nitrogen in the soil had a 
deleterious effect on the growth of the plants (see page 174). 
